Materials Today Communications
·
2024
·
IF 3.7
Chunlong Qiu,Haiyang Sun,Yeyang Ni,Zhenjiang Dou,Ming Xia,Zhaoyang Fei,Zhuxiu Zhang,Mifen Cui,Qing Liu,Xu Qiao
The impressive water stability demonstrated by MIL-101(Cr) highlights its considerable potential for the effective elimination of organic contaminants from wastewater. Nevertheless, the limited availability of adsorption sites within MOFs leads to an unsatisfactory capacity for tetracycline (TC) adsorption. In this case, the lanthanum modified MIL-101(Cr) porous adsorbents, termed as nLa-MIL-101(Cr), were successfully synthesized using a post-synthetic modification method. Through various characterization analyses, it was confirmed that lanthanum exists in the form of La(OH) 3 within the adsorbents, and all adsorbents also preserved the original structure as MIL-101(Cr). The results of static adsorption experiments demonstrated that, compared to the original material, the adsorption capacity of 1La-MIL-101(Cr) for TC increased by 3.5 times. Further experiments demonstrated that the adsorbent exhibits remarkable ion interference resistance and cycle stability. Finally, based on X-ray photoelectron spectroscopy, the adsorption mechanism was primarily attributed to the coordination between TC molecules and metals active site, while electrostatic interactions also played a significant role in the process. This study has developed a highly efficient adsorbent for the treatment of TC-contaminated wastewater, which reflects promising practical application prospects.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Tongxin Xiao,Kangyue Qiao,Guodong Hao,Songyao Du,Yue Wang,Chao Sui
This study employed a solvothermal method to prepare an NH 2 -MIL-101(Fe, Co) bimetallic organic framework composite catalyst aimed at enhancing the photocatalytic reduction performance of Cr(VI). The experimental results show that introducing Co into the single-metal NH 2 -MIL-101(Fe) does not alter the material's octahedral structure. However, the bimetallic synergistic effect shifts the light absorption range to the red end of the spectrum, reduces the bandgap, and significantly improves carrier separation efficiency. Under visible light irradiation, the NH 2 -MIL-101(Fe, 0.15Co) catalyst exhibited outstanding photocatalytic performance, achieving a reduction efficiency of 94.7% for Cr(VI) within 40 minutes and 100% within 50 minutes, with a reaction rate constant 4.7 times that of the single-metal NH 2 -MIL-101(Fe). Free radical capture experiments further revealed that ·O 2 - is the key active species in the Cr(VI) reduction process, while photo-generated holes in the valence band can oxidise OH - to ·OH, synergistically participating in the reaction. Additionally, cyclic stability experiments showed that the catalyst maintained 85.8% reduction efficiency after five cycles, demonstrating excellent stability and practical application potential.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Li Song,Weiguo Zhang,Quan Liu,Xiao Zhang,Fuqiang Liu,Aimin Li
Various organic acids commonly coexist with Cr(VI) in wastewater. However, direct electron transfer between Cr(VI) and electron-rich organic acids is typically slow. Current Fe-based mediators primarily operate through the aqueous Fe(III)/Fe(II) cycle, which faces challenges in achieving efficient Fe recycling. To address the efficient removal of Cr(VI) and sodium citrate (Cit) composite pollutants (Cr(VI)-Cit), iron-loaded carbon nitride composites (Fe/CN) were synthesized via a combined loading-calcination approach. Crucially, coordination between carboxylate groups of Cit and undercoordinated Fe sites on Fe/CN formed photoactive complexes, effectively stimulating ligand-to-metal charge transfer (LMCT). This significantly enhanced the solid-phase Fe(III)/Fe(II) cycling efficiency, leading to a markedly increased Cr(VI) reduction rate constant ( k ) of 0.213 mg/(L·min). Furthermore, coordination with the N-rich matrix effectively inhibited Fe leaching, resulting in a post-reaction total Fe concentration below 0.5 mg/L. The formation of a Cr(VI)-Fe-Cit ternary cyclic complex effectively lowered the activation energy for Cr(VI) reduction by 81.3% compared to pristine CN. In the dark, intramolecular electron transfer within this complex generated Fe(II)-Cit species with a low electrode potential. Under irradiation, the photoactive Fe(III)-Cit complex generated Fe(II) via LMCT to reduce Cr(VI); concurrently, photogenerated electrons (e - ) and superoxide radicals (·O 2 - ) also contributed to Cr(VI) reduction. Reusability tests showed Fe/CN retained ∼90% Cr(VI) removal efficiency from actual wastewater over 5 cycles, demonstrating good stability under realistic conditions. This study provides valuable insights for the cost-effective and efficient remediation of Cr(VI)-organic acid complexes in real wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2025
·
IF 4.8
Jin Mengyu,Wu Detong,Song Yuanbo,Shi Yang,Wang Xiaoxia,Shen Zheng,Zhang Yalei
This study presents an efficient strategy for converting high-boiling solvent (HBS) pretreated cellulose into lactic acid (LA) over a Cr-Sn-Beta bimetallic catalyst synthesized by flash Joule heating (FJH). Ethylene glycol-based HBS pretreatment effectively enriched cellulose content in straw, while the FJH method enabled rapid and uniform metal incorporation. The resulting Cr-Sn-Beta catalyst exhibited a maximum LA yield of 33.54% with a carbon balance of 90.08%, showing high selectivity and catalytic efficiency. The synergistic function of Cr and Sn acid sites was also evaluated. This work provides a promising route for biomass valorization and catalyst design via combined pretreatment and advanced synthesis techniques.
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Huirong Zhang,Yi Shen,Jinglei Cui,Baofeng Wang,Yanxia Guo,Dongke Zhang,Fangqin Cheng
s Lignin-derived carbonaceous materials have emerged as promising candidates for heavy metal remediation owing to their low cost, tunable surface chemistry, and hierarchical porosity. In this study, a FeCl 3 –urea co-activation strategy was employed to synthesize N-doped hierarchical porous carbons (N-HPCs) from lignin for efficient Cr (VI) removal. The synthesis parameters were systematically optimized using a machine learning (ML) workflow, with experimental data serving as the training set. Gradient boosting regression (GBR) achieved high predictive accuracy (R 2 = 0.86), and SHAP-based feature importance analysis identified pyridinic-N (N-5) content as the dominant factor governing Cr (VI) adsorption, attributed to its redox-active nature. Under optimal conditions (FeCl 3 :lignin:urea = 3:1:0.5), the resulting N-HPC exhibited a high specific surface area (2297.5 m 2 /g), elevated N-5 content (67.08%), and a maximum Cr (VI) adsorption capacity of 627.1 mg/g. Mechanistic studies revealed that reduction–complexation, primarily facilitated by N-5 sites, accounted for up to 87.7% of Cr (VI) removal. The ML-driven inverse design strategy further predicted that precise control of N-5 levels could yield N-HPCs with adsorption capacities exceeding 650 mg/g. This work demonstrates the synergy of ML-guided optimization and mechanistic insight, providing a robust framework for the rational design and accelerated development of sustainable, high-performance adsorbents for heavy metal remediation.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yongshan Ma,Qingxiang Guan,Huayun Zang,Fengxia Zhang,Tianyi Jiang,Xuemei Li,Yanyan Zhu
Solar-driven photocatalysis is a promising green technology for wastewater treatment. Molybdenum disulfide (MoS 2 ) is a highly efficient visible-light photocatalyst. However, due to the rapid recombination of photoinduced electron-hole (e - -h + ) pairs, its photocatalytic activity is severely limited, thereby hindering its practical application. To solve this problem, a novel MoS 2 -3,4,9,10-perylene tetracarboxylic acid (MoS 2 -PTCDG) heterojunction was synthesized via a hydrothermal method. In this composite, PTCDG nanosheets are embedded in the interlayer spaces of three-dimensional flower-like MoS 2 nanospheres, forming an organic–inorganic heterostructure. This design not only improves the separation efficiency of photogenerated e - -h + pairs, but also the hydrophilic terminal carboxyl groups on PTCDG can serve as adsorption sites for Cr(VI) pollutants. The MoS 2 -PTCDG composite demonstrates exceptional photocatalytic activity and stability in degrading Cr(VI) under simulated sunlight, achieving a reaction rate constant 2.5 times higher than that of pure MoS 2 . This study highlights the potential of rationally designed organic–inorganic heterostructures to overcome the limitations of traditional MoS 2 -based photocatalysts, thus offering new insights into the development of high-performance photocatalytic materials for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Li Jionghui,Zhang Weiquan,Chen Qing,Xiong Chunhua
Polyacrylonitrile-2-aminopyridine (PAN-TAP) is a novel chelating fiber rapidly prepared by microwave-assisted synthesis method. The optimal synthesis conditions are microwave power of 800 W, reaction at 140 ℃ for 20 min. Fourier transform infrared spectroscopy (FT-IR) shows nucleophilic addition reaction between cyanide and 2-aminopyridine in PAN fibers. thermogravimetric analysis (TGA) shows that the synthesized material is stable within 200 ℃. Scanning electron microscopy (SEM) shows that synthetic materials have a larger diameter and a very rough surface compared to PAN fibers. The synthesized materials were also characterized by elemental analysis, energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Meanwhile, the adsorption characteristics and mechanism of PAN-TAP for Cr(Ⅵ) were evaluated. When the pH of the solution is 2, the adsorption capacity of Cr (Ⅵ) is the highest and it has good separation ability, with a maximum separation coefficient of β Cr/Ni = 357.75. The adsorption process conforms to the Langmuir isothermal adsorption model and the pseudo-second-order kinetic model, indicating that the adsorption mechanism is a chemisorption of monolayer adsorption. Cr(Ⅵ) is reduced to Cr(Ⅲ) by the amino groups on the fiber and then adsorbed. The maximum theoretical adsorption capacity is 287.1 mg/g (at 298 K), and the adsorption equilibrium can be reached within 1 h. The thermodynamic parameter Δ H > 20 kJ·mol − 1 indicates that adsorption is a spontaneous endothermic process. PAN-TAP fibers can be eluted with hydrochloric acid and reused. Overall, PAN-TAP is a cost-effective and rapid adsorbent, which has broad application prospects for the removal of Cr(Ⅵ) in water.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Tang Xiaojing,Shakeel Zeb,Hao Li,Abdul Haleem,Zhong Hua
The removal of hexavalent chromium from wastewater is a pressing environmental challenge due to its high toxicity and strong mobility in aquatic systems. To address this issue, we engineered a three-dimensional porous biomonolith via redox cryopolymerization, leveraging the abundant functional groups and structural advantages of covalently crosslinked lignin and chitosan for efficient chromium adsorption. Remarkably, the developed biomonolith exhibited a high chromium adsorption capacity of 232.2 mg/g at pH 2, reaching 63.6% of equilibrium uptake within the first 30 min and achieving full equilibrium in 90 min. This enhanced performance stems from the synergistic effects of the material’s macroporous structure, which facilitates rapid chromium diffusion, and its multifunctional surface chemistry, featuring amine, amide, sulfonic, and oxygen-containing groups. These functional groups promote chromium adsorption through electrostatic interactions and partial reduction of Cr(VI) to Cr(III), as confirmed by X-ray photoelectron spectroscopy (XPS). The positively charged Cr(III) further strengthens electrostatic interactions with lignin’s oxygen-containing groups, enhancing adsorption. The chromium adsorption process followed the pseudo-second-order kinetic model (R² = 0.972) and the Freundlich isotherm (R² = 0.93), indicating chemisorption and surface complexation as the dominant mechanisms. The developed biomonolith exhibits enhanced selectivity, improved shelf stability, and excellent reusability for chromium adsorption. This lignin-based biomonolith presents a promising solution for Cr(VI) removal, offering significant potential for environmental applications and advancing research in sustainable wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Dongfang Wang,Guilong Zhang,Zhangyu Dai,Linglin Zhou,Po Bian,Kang Zheng,Zhengyan Wu,Dongqing Cai
In this work, a novel nanosystem with a sandwich-like structure was synthesized via face-to-face combination of two pieces of waste cotton fabrics (CFs) carrying ferrous sulfide (FeS) and carboxyl-functionalized ferroferric oxide microsphere (CFFM), respectively, and the obtained nanosystem was named as FeS/CFFM/CF. Therein, FeS has high reduction and adsorption capabilities for hexavalent chromium (Cr(VI)), CFFM possesses a high adsorption ability on cadmium ion (Cd(II)) through electrostatic attraction and chelation, and CF displays high immobilization ability for FeS and CFFM and adsorption performance on Cd(II). FeS/CFFM/CF could simultaneously remove Cr(VI) and Cd(II) from water and inhibit the uptake of Cr and Cd by fish and water spinach, ensuring the food safety. Besides, this technology could efficiently control the migration of Cr(VI) and Cd(II) in the sand–soil mixture, which was favorable to prevent their wide diffusion. Importantly, FeS/CFFM/CF possessed a high flexibility and could be conveniently produced with needed scale and shape and easily separated from water and soil, displaying a promising approach to remediate Cr(VI)-/Cd(II)-contaminated water and soil and a huge application potential.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Research
·
2025
·
IF 10.7
Jie Zhou,Jiao Yang Lu,Zhi Xin Xie,Dong Hua Wang,Bin Sheng He,Wei Tao Huang
Polymetallic nanomaterials have important development potential by integrating the properties and advantages of their components. However, their preparation paradigm urgently needs to be updated to make full use of their characteristics to realize their multifaceted applications. In this study, multifunctional trimetallic gold–silver–chromium nanocomposites (Au–Ag–Cr NCs) were successfully synthesized, and their polymetallic plasmonic absorption properties were used in a variety of applications, from multimode and multianalyte sensing, advanced arithmetic, and reversible logic to long-text information protection. Au–Ag–Cr NCs with Au or Ag nanoparticles anchored on Cr nanobelts were synthesized using Au–Cr nanoseeds, Ag + , ascorbic acid as the reductant, and sodium dodecylbenzenesulfonate as the stabilizer. The resulting Au–Ag–Cr NCs exhibited multichannel sensing ability for 2 analytes (Hg 2+ and hypochlorite), with remarkably improved selectivity and sensitivity when analyzing combined channels. Multiresponsiveness of Au–Ag–Cr NCs to diverse substance combinations underpins input–output mapping relationships, enabling advanced molecular logic computations (such as arithmetic and reversible logic). By digitizing its intrinsic sensing and response mechanisms, advanced molecular information protection (including encoding, encryption, and information concealment) for extended text were successfully implemented. This work not only offers novel insights into the design and multifunctionality of multicomponent nanocomposites but also paves the way for a new paradigm in molecular information technology that integrates sensing, logic processing, and information security.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Liqing Zhang,Bo Li,Zhenye Jiang,Haoyuan Xu,Chengqian Li,Yonggang Wei,Hua Wang
Among many pollution sources, Cr(VI) has captured much attention because of its strong toxicity, bioaccumulation and carcinogenicity. In recent years, nanoscale magnesium oxide has shown great potential in removing Cr(VI) pollution in water by virtue of its excellent adsorption and environmental friendliness. In this study, a high‑magnesium slag produced during the nitric acid pressure leaching process of laterite nickel ore was utilized as raw material for nano MgO preparation. A nano MgO-based adsorbent material (T-MgO) was prepared via the modification of MgO by nano TiO 2 which was synthesized use low-grade titanium slag as titanium source. Adsorption results demonstrated that T-MgO exhibits rapid adsorption performance, reaching adsorption equilibrium within 60 min. The kinetic adsorption conforms to the pseudo-second-order (PSO) model, revealing a chemisorption-dominated mechanism. According to the Freundlich model analysis, saturated adsorption capacity of the T-MgO for Cr(VI) reached 241.53 mg/g. The T-MgO material also possesses excellent reusability and selectivity to Cr(VI) adsorption. Furthermore, an in-depth analysis was performed to elucidate the Cr(VI) removal mechanism. Cr(VI) existing as HCrO 4 − and Cr₂O₇ 2− species under pH = 2 is electrostatically adsorbed on the protonated active sites of T-MgO. With the participation of free electrons generated by the nano-TiO 2 semiconductor, Cr(VI) is reduced to low-toxicity Cr(III), forming Mg-O-Cr bonds. The study achieved the purposes of superior and economic removal of Cr(VI) and high value-added utilization of the magnesium and titanium secondary resources.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Bing Li,Weiquan Li,Qian Zuo,Weizhao Yin,Ping Li,Jinhua Wu
A weak electric field (WEF, 2 mA cm −2 ) was employed to promote Fe(III)/Fe(II) cycle on goethite-impregnated activated carbon (FeOOH@AC) filled in a continuous-flow column for enhanced Cr(VI) elimination from water. Surficial analysis and Cr species distribution showed that α-FeOOH of 0.2–1 μm was successfully synthesized and evenly loaded onto AC. Electron transfer from WEF to α-FeOOH was facilitated with AC as electron shuttles, thereby boosting Fe(III) reduction in the α-FeOOH. The generated Fe(II) reduced Cr(VI) and the resultant Cr(III) subsequently precipitated with OH − and Fe(III) to form Cr(OH) 3 and (Cr χ Fe 1-χ )(OH) 3 . Therefore, the WEF-FeOOH@AC column exhibited a much lower Cr(VI) migration rate of 0.0018 cm PV −1 in comparison with 0.0037 cm PV −1 of the FeOOH@AC column, equal to 104 % higher Cr(VI) elimination capacity and 90 % longer column service life-span. Additionally, under different Cr(VI) loadings by varying either seepage velocities or influent Cr(VI) concentrations, the WEF-FeOOH@AC column maintained 1.0–1.5 folds higher Cr(VI) elimination and 0.9–1.4 folds longer longevity than those of the FeOOH@AC column owing to the interaction between FeOOH@AC and WEF. Our research demonstrated that WEF-FeOOH@AC was a potential method to promote Cr(VI) elimination from water and offer an effective strategy to facilitate Fe(III)/Fe(II) cycle in iron oxides .
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）